(Act 1) 28. What advice does Willy give Biff on the evening before he goes to see Bill Oliver? How does Willy contradict himself again?

Willy tells Biff to wear a business suit, talk as little as possible, don't make jokes, walk in seriously, ask for fifteen thousand dollars, don't say, "Gee," walk in with a big laugh and tell a couple of stories to lighten things up, and that personality wins the day. The contradictions are that Biff is not supposed to talk much, but he is supposed to start out with a couple of stories. He is to be serious and not joke, yet he is supposed to "lighten things up."